I must say I did not work too hard. I started from late November, not very movivated, and found I have not finished half of the CR and SC, let alone RC or Math early december. I posted on a forum for help and someone proposed me to start on mocks using an gmat instructor's exams. I did vebal part of 6 of them and finished in 85-90 minutes each, missing 3-15 questions each. I was relatively good at cr. When I did og, I got only 15 out of 214 wrong and thus I did not spend too much time on it. sc ws harder. I tried to understand the sentence first and then pick up any grammarticl errors, choose the one that is concise. After some prctices, I got some sense about sc. My weak pront is rc, which according to princeton review 2004, I spent average 3 plus minutes each queston.
In exam, I focus on time control, targeting at finishing 1-10 before 55 minutes remaing, 11-20 with 37, 21-30 with 19, and the 31-41 the remaining. When I met difficult ones which I couldn't solve in 3 minutes, I guessed on them and moved on to next. I figured I would still get them wrong spending 5 or more minutes on them. For me, the trick was to get above 50 on math, once I did that I thought I had a big chance scoring above 700. I feel staisfctory considering my effort spent and the score I got. I didn't ask for much and 720 will do for me.
Good luck,
Jim